# Renovation Contractors in Singapore

HDB flat owners must use contractors listed in HDB's Directory of Renovation Contractors (DRC), and works like hacking walls or replacing floors need an HDB permit. Qanvast's 2025 data puts a typical 4-room renovation at about $51,000–$62,000 for a BTO and $64,000–$80,000 for a resale flat.

## Key facts
- Listings: 395
- Matched to a government licence/register: 180
- Median years in business: 19

## Prices in Singapore
Expected 2025 HDB renovation costs from Qanvast, based on 259 BTO and 302 resale projects. Resale flats cost more because of hacking, rewiring and replumbing. Hidden works can push costs up significantly.

| Service | Typical price | Notes |
|---|---|---|
| 3-room BTO | S$36,100–S$43,700 per flat | Fewer than 30 data points; indicative |
| 4-room BTO | S$51,000–S$61,800 per flat |  |
| 5-room BTO | S$67,000–S$82,400 per flat |  |
| 3-room resale | S$51,000–S$61,800 per flat | Full reconfiguration can cost much more |
| 4-room resale | S$64,300–S$80,300 per flat |  |
| 5-room resale | S$84,300–S$97,000 per flat |  |
| Hacking and disposal of floor tiles | S$3–S$8 per sq ft | Requires an HDB permit; screeding extra |

## Licences
- **Directory of Renovation Contractors (DRC)** (Housing & Development Board (HDB), required): Under the Housing & Development (Renovation Control) Rules, HDB flat owners must only engage contractors listed in the DRC for renovation works. DRC contractors apply for HDB permits on your behalf and can be given demerit points or debarred for breaches. Check: https://www.hdb.gov.sg/managing-my-home/renovation-and-maintenance/renovation/important-information-on-renovations
- **CaseTrust accreditation for renovation businesses** (Consumers Association of Singapore (CASE), optional): Voluntary. Accredited firms cap the initial deposit at 20% of contract value, buy a deposit performance bond, use the CaseTrust Standard Renovation Contract and give at least a 12-month workmanship warranty. A joint CaseTrust–RCMA scheme exists for RCMA members. Check: https://casetrust.case.org.sg/Home/casetrustlist
- **BCA Approved Window Contractor** (Building and Construction Authority (BCA), required): Window installation or replacement must be done by a BCA-approved window contractor (registered under workhead RW01) using trained window installers. For HDB flats the firm must also be listed with HDB. Check: https://www1.bca.gov.sg/public/private-property-ownership/approved-window-contractors

## How to choose
- Verify the contractor is in HDB's Directory of Renovation Contractors before signing, and confirm they will apply for any permit needed (hacking, flooring, windows, piping changes).
- Get at least three itemised quotations based on the same scope and drawings, with quantities (sq ft, foot run) and brands, so you can compare like for like.
- Prefer a CaseTrust-accredited firm if you want deposit protection: the initial deposit is capped at 20% and protected by a performance bond.
- Tie progress payments to completed milestones, not dates, and hold back a final payment until defects are rectified.
- Ask to see a completed project of similar age and flat type, especially for resale flats where rewiring and replumbing are common.

## Red flags
- Asking for more than 20–30% upfront, or full payment for carpentry before it is installed.
- Offering to hack walls or change floors without an HDB permit to save time.
- Lump-sum quotes without quantities, brands or specifications.
- Contractors who are not in the DRC but offer to 'use a friend's licence'.
- Pressure to sign on the spot with a limited-time discount.

## Listings (top 30)
- [Woh Hup (Private) Limited](https://lookup.sg/biz/woh-hup-private-limited), Bukit Timah · 217 Upper Bukit Timah Rd · 7 min walk from Beauty World MRT · BCA registered · registered 1940
- [Unimax Creative](https://lookup.sg/biz/unimax-creative), Novena · 288 Balestier Rd #02-02 · 12 min walk from Novena MRT · BCA registered · registered 2002
- [K.W. Const & Engrg Pte Ltd](https://lookup.sg/biz/k-w-const-and-engrg-pte-ltd), Clementi · 42 Toh Guan Rd E #01-77 · 16 min walk from Jurong East MRT · BCA registered · registered 2003
- [Prelim Construction Pte Ltd](https://lookup.sg/biz/prelim-construction-pte-ltd), Ang Mo Kio · 81 Tagore Ln · 9 min walk from Lentor MRT · BCA registered · registered 1997
- [Shaft Build Construction Pte Ltd](https://lookup.sg/biz/shaft-build-construction-pte-ltd), Clementi · 48 Toh Guan Rd E #09-118 Enterprise Hub · 16 min walk from Bukit Batok MRT · BCA registered · registered 1987
- [Hydro-Seal Engineering](https://lookup.sg/biz/hydro-seal-engineering), Hougang · #03-78 Defu Lane 10 · 14 min walk from Kovan MRT · BCA registered · registered 1995
- [Innovez Engineering Pte Ltd](https://lookup.sg/biz/innovez-engineering-pte-ltd), Clementi · 38 Toh Guan Rd E, #01-53 Enterprise Hub · 16 min walk from Jurong East MRT · BCA registered · registered 2006
- [Jurong Engineering Limited](https://lookup.sg/biz/jurong-engineering-limited), Boon Lay · 25 Tanjong Kling Rd · BCA registered · registered 2005
- [Sunray Woodcraft Construction](https://lookup.sg/biz/sunray-woodcraft-construction), Sungei Kadut · 9 Sungei Kadut Street 3 · 24 min walk from Kranji MRT · BCA registered · registered 1987
- [TCB Sports Pte Ltd](https://lookup.sg/biz/tcb-sports-pte-ltd), Jurong West · 54 Kian Teck Rd · 15 min walk from Pioneer MRT · BCA registered · registered 1976
- [Huasing Construction & Trading](https://lookup.sg/biz/huasing-construction-and-trading), Sungei Kadut · 52 Sungei Kadut Lp · 20 min walk from Yew Tee MRT · BCA registered · registered 1991
- [Wee Chwee Huat Scaffolding and Construction](https://lookup.sg/biz/wee-chwee-huat-scaffolding-and-construction), Woodlands · 68 Woodlands Industrial Park E9 · 14 min walk from Admiralty MRT · BCA registered · registered 1991
- [DLE M&E Pte Ltd](https://lookup.sg/biz/dle-m-and-e-pte-ltd), Bedok · 2 Kaki Bukit View, #05-00 Kaki Bukit Techpark II · 2 min walk from Kaki Bukit MRT · BCA registered · registered 1980
- [Rotary Engineering Pte. Ltd](https://lookup.sg/biz/rotary-engineering-pte-ltd), 61 Jurong Island Hwy · BCA registered · registered 1980
- [Robin Village Development](https://lookup.sg/biz/robin-village-development), Tuas · 63 Tuas South Ave 1, Tiong Seng Prefab Hub · BCA registered · registered 1984
- [B&E Group Pte Ltd](https://lookup.sg/biz/b-and-e-group-pte-ltd), Bishan · 37 Jalan Pemimpin Mapex, #04-08 · 1 min walk from Marymount MRT · BCA registered · registered 2004
- [Kok Kiat Machinery Pte Ltd](https://lookup.sg/biz/kok-kiat-machinery-pte-ltd), Tuas · 4 Tuas South Street 12 · BCA registered · registered 1998
- [Home Fibre Industrial](https://lookup.sg/biz/home-fibre-industrial), Serangoon · 5048 Ang Mo Kio Ind Park 2, #01-613 · 17 min walk from Ang Mo Kio MRT · BCA registered · registered 2001
- [Pan Sin Engineering Pte Ltd](https://lookup.sg/biz/pan-sin-engineering-pte-ltd), Woodlands · 42 Woodlands Industrial Pk E7 · 16 min walk from Admiralty MRT · BCA registered · registered 1999
- [Bachy Soletanche Singapore](https://lookup.sg/biz/bachy-soletanche-singapore), Clarke Quay · 1 Coleman St, #06-09 The Adelphi · 3 min walk from City Hall MRT · BCA registered · registered 1982
- [Syscon Pte Ltd](https://lookup.sg/biz/syscon-pte-ltd), Tuas · 30 Tuas Bay Dr · 23 min walk from Tuas West Road MRT · BCA registered · registered 1976
- [Yeng Tong Construction Pte Ltd](https://lookup.sg/biz/yeng-tong-construction-pte-ltd), Jalan Besar · 33 Maude Rd, #03-01 YTC Building · 6 min walk from Lavender MRT · BCA registered · registered 1985
- [Aquatech Products & Services](https://lookup.sg/biz/aquatech-products-and-services), Bedok · 18 Kaki Bukit Rd 3, #04-13 · 9 min walk from Kaki Bukit MRT · BCA registered · registered 1988
- [HSC Pipeline Engineering](https://lookup.sg/biz/hsc-pipeline-engineering), Sembawang · 38 Senoko Rd · BCA registered · registered 1993
- [Daiya Engineering and Construction](https://lookup.sg/biz/daiya-engineering-and-construction), Sungei Kadut · 23 Kranji Wy · BCA registered · registered 1987
- [Mun Siong Engineering](https://lookup.sg/biz/mun-siong-engineering), Pioneer · 26 Gul Wy · 18 min walk from Gul Circle MRT · BCA registered · registered 1969
- [Greeen](https://lookup.sg/biz/greeen), Bukit Merah · 8 Jln Kilang Timor #03-02/02A Kewalram House · 12 min walk from Redhill MRT · BCA registered · registered 2009
- [Huationg Contractor Pte Ltd](https://lookup.sg/biz/huationg-contractor-pte-ltd-pioneer), Pioneer · 9 Benoi Cres · 24 min walk from Pioneer MRT · BCA registered · registered 1983
- [Nic & Wes Builders](https://lookup.sg/biz/nic-and-wes-builders), Geylang · 53 Ubi Ave 1, #05-52 Paya Ubi Industrial Park · 7 min walk from Ubi MRT · BCA registered · registered 2002
- [Samwoh Corporation](https://lookup.sg/biz/samwoh-corporation), Sungei Kadut · Samwoh Smart Hub, 12 Kranji Way · BCA registered · registered 1985

## By area
- Geylang: 39
- Sungei Kadut: 24
- Woodlands: 23
- Bedok: 22
- Sembawang: 22
- Clementi: 20
- Pioneer: 18
- Bukit Batok: 17
- Serangoon: 17
- Bukit Merah: 16
- Jurong West: 16
- Toa Payoh: 15
- Bishan: 14
- Tampines: 14
- Tuas: 13

## FAQs
### How much does it cost to renovate an HDB flat in 2025–2026?
Qanvast's 2025 figures put a 3-room BTO at about $36,100–$43,700, a 4-room BTO at $51,000–$61,800 and a 5-room BTO at $67,000–$82,400. Resale flats cost more: about $64,300–$80,300 for a 4-room and $84,300–$97,000 for a 5-room, because of hacking, rewiring and replumbing. Budget a contingency for hidden works.

### Do I need a permit to renovate my HDB flat?
Some works need HDB approval and others do not. Hacking or removing walls, replacing or raising floor finishes, window replacement and changes to sanitary piping all need approval, which your DRC contractor applies for. Simple works such as painting, carpentry and installing lights or fans generally do not. Check HDB's renovation guidelines for your specific works.

### What is HDB's Directory of Renovation Contractors?
It is HDB's list of contractors allowed to carry out renovation works in HDB flats. Under the Housing & Development (Renovation Control) Rules, flat owners must only engage DRC-listed contractors. HDB can fine errant contractors, give demerit points and debar those who exceed the threshold, and unauthorised works must be reinstated at the owner's and contractor's cost.

### Can I change my BTO toilet tiles immediately?
Owners of new BTO flats are generally required to wait three years before removing wall or floor finishes in toilets, to avoid damaging the original waterproofing. Tiling over existing tiles is an alternative some owners use. Any toilet works that affect floor finishes or piping still require a permit, so confirm the current rule with HDB or your DRC contractor.

### What protection do I get from a CaseTrust renovation firm?
CaseTrust-accredited renovation businesses cap your initial deposit at 20% of the total cost and protect it with a deposit performance bond if the firm closes or is wound up. They must use the CaseTrust Standard Renovation Contract, collect payments by milestones, give at least a 12-month workmanship warranty and go through CASE mediation for disputes.

## Sources
- HDB: Important information on renovations (Renovation Control Rules): https://www.hdb.gov.sg/managing-my-home/renovation-and-maintenance/renovation/important-information-on-renovations
- HDB: Renovation guidelines: https://www.hdb.gov.sg/managing-my-home/renovation-and-maintenance/renovation/renovation-guidelines
- MND written answer on renovation approvals in older HDB flats (2025): https://www.mnd.gov.sg/newsroom/speeches/view/written-answer-by-ministry-of-national-development-on-criteria-or-requirements-for-approval-of-renovation-works-in-older-hdb-flats
- CASE: CaseTrust accreditation for renovation businesses: https://case.org.sg/casetrust/casetrust-accreditation-for-renovation-businesses/
- CASE: List of CaseTrust-accredited businesses: https://casetrust.case.org.sg/Home/casetrustlist
- Qanvast: How much is a 3, 4 and 5-room HDB renovation in 2025? (15 Jan 2025): https://qanvast.com/sg/articles/-3384
- BCA: Window safety (approved window contractors): https://www1.bca.gov.sg/regulatory-info/building-control/window-safety

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Source: Lookup (https://lookup.sg) · Data as of October 2026 · Listings compiled from Singapore government open data (data.gov.sg), OneMap and Overture Maps places. Free listings never show contact details; featured listings are labelled.